To clean up your Disk from unnecessary files, Cache memory Install and Run the following apllication Once a Week. Before running the Application close all open Application first.  once the Application Complete his Task Restart the VPS.

CCLeaner - http://www.ccleaner.com/ccleaner




For analyzing your Disk usage you can try installing any of the following Application.

1. Disk Savvy - http://www.disksavvy.com/




2. WinDirStat - https://windirstat.net/